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All Questions
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153556 Questions
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insert title here
Pat has two sheets of large, square stamps. One sheet consists of 9 stamps arranged in a 3-by-3 square. (That's 3 stamps by 3 stamps, not 3 inches by 3 inches.) The other sheet consists of 36 stamps arranged in a 6-by-6 square. The stamps on each sheet
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musicalnote
Jul 10, 2019
+1
160
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Area of Similar Triangles
If E is the middle point of the side CA of the triangle ABC and if R is the area of the triangle, prove that: Cot AEB = (BC2 - BA2) / 4R
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OldTimer
Jul 10, 2019
+1
148
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+1338
Help me again(HW PROB WARNING)
Ok, here's the drill, please give me a nudge, this is a HOMEWORK PROBLEM! Yayyyy! I need help! Booooo!
What is the value of the sum ? Express your answer as a fraction in simplest form.
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tommarvoloriddle
Jul 10, 2019
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164
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Help!
Help me, please!
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tommarvoloriddle
Jul 10, 2019
0
95
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Repost...
In the figure,
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Guest
Jul 10, 2019
0
106
1
HALPPP!!!
In the figure,
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Guest
Jul 10, 2019
0
121
15
Is KhanAcademy website doesn't work currently or is it just me?
On pc.
off-topic
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Guest
Jul 10, 2019
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help!!
You are given a fair six-sided dice with the numbers 1 – 6 on the 6 sides. You roll the dice six times. What is the probability of rolling a 5 or 6 at least 5 times? Round your answer to 2 decimal places. I got the answer, but i want a
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Guest
Jul 10, 2019
+1
238
3
+53
The angle of elevation of the top of a tower to a point on the ground is 61. At a point 600 feet farther from the base, in line with the bas
The angle of elevation of the top of a tower to a point on the ground is 61 degrees. At a point 600 feet farther from the base, in line with the base and the first point and in the same plane, the angle of elevation is 32 degrees . Find the height of the
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cormier123
Jul 10, 2019
Jul 9, 2019
0
112
1
What is the value of arccos(−12) in radians?
What is the value of arccos(−12) in radians?
* π / 3
* 5π / 6
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Guest
Jul 9, 2019
+1
139
1
What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?
What is the value of cosθ given that (−2, −3) is a point on the terminal side of θ ?
* 2√13 / √13
* −2√13 / √13
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Guest
Jul 9, 2019
0
106
1
value of sinθ in simplified form
The terminal side of θ passes through the point (7, −1) . What is the exact value of sinθ in simplified form?
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Guest
Jul 9, 2019
+1
127
4
+478
Help
Given that m and n are positive integers such that m is congruent to 6 (mod 9) and n is congruent to 0 (mod 9), what is the largest integer that mn is necessarily divisible by?
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xXxTenTacion
Jul 9, 2019
0
144
2
Help Urgent
A line passes through (4,365), and the y-intercept of the line is on or between 1 and 9 . What is the minimum possible slope of the line?
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Guest
Jul 9, 2019
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116
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Help Urgent
Write the equation, in slope-intercept form, of the line passing through the origin and the point (-4,3) .
hectictar
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Guest
Jul 9, 2019
0
108
1
Help
Express the equation of the line passing through points $(1,7)$ and $(-2,-3)$ in the form $ax+by=c$, where $a$, $b$ and $c$ are integers, the greatest common divisor of $a$ and $b$ is 1, and $c<0$.
THX!!!
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Guest
Jul 9, 2019
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126
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help!!
You are given a fair six-sided dice with the numbers 1 – 6 on the 6 sides. You roll the dice six times. What is the probability of rolling a 5 or 6 at least 5 times? Round your answer to 2 decimal places.
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adawertfswert
Jul 9, 2019
0
112
3
Help please
1) Find the sum of the infinite series
2) In a certain sequence the first term is = 2007 and the second term is = 2008. Furthermore, the values of the remaining terms are chosen so that for all . Determine
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Guest
Jul 9, 2019
0
163
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Sum of sequence
What is the sum of the following sequence:
1.2.3.4.5....+ 2.3.4.5.6....+ 3.4.5.6.7....4.5.6.7.8....+996.997.998.999.1000.
Any help would be greatly appreciated. I thank you.
heureka
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Guest
Jul 9, 2019
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156
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model selection after fitting probabilty distribution on dataset
how do you compute the model with a minimum residual after fitting probability distributions on a dataset
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Guest
Jul 9, 2019
+8
213
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+1338
RIDDLE CHALLENGE # breaking web2.0calcs ice run 2
Right, rules are simple, I post, then somebody posts the solution, and has the honor of posting the next riddle, and the person who solves that can post the next riddle, etc. I have a math riddle:
I am a number
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tommarvoloriddle
Jul 9, 2019
0
173
3
help
James has a collection of 20 miniature cars and trucks. Cars make up 40% of the collection. If James adds only cars to his collection, how many cars must he add to make the collection 75% cars?
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Guest
Jul 9, 2019
0
102
2
Help With Counting & Probability Problem
Mack the bug starts at (0,0) at noon and each minute moves one unit right or one unit up. He is trying to get to the point (5,7). However, at (2,3) there is a spider that will eat him if he goes through that point. In how many ways can Mack reach
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Guest
Jul 9, 2019
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88
0
Help please
Consider the projection matrix P that satisfies Pv = Projection of v onto ]. Find 3 vectors with integer components and magnitude no greater than 8 that satisfy Pv = .
Then, find .
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Guest
Jul 9, 2019
Jul 8, 2019
+2
158
3
can't make an account
hello,
i can't register for an account. i did all the steps and then after i confirm i'm not a robot, it says "internal error".
can anyone help?
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off-topic
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Guest
Jul 8, 2019
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